Fire-extinguisher.



' W. H. .BANFIL.

FIRE EXTINGUISHBR, APPLIOATION rIL'Bn 001'. 19,1907.

Patented Jan. 5, 1909.

THE NORRIS r5122: 60.,w4sumc1on, b. c.

UNITED STTl'idi PATENT OEFFTCFQ.

WILLIAM H. BANFIL, OF BOSTON, MASSACHUSETTS.

FIRE-EXTINGUISi-IER.

To all whom it may concern:

Be it known that 1, WILLIAM H. BANFIL, of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Fire-Extinguishers, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to fire extinguishersof the type comprising a cylindrical shell or case provided with a removable cap or cover and containing a holder for the bottle which contains one of the chemical ingredients.

The invention has for its object to provide a ring-like member, having means for engaging the neck of the case, with improved means for loosely supporting a sealing-plate which is adapted to engage a seat on the case and to be moved in a vertical direction toward and from its seat by turning the ring-like member, and to be supported by said ring-like member when the latter is removed from the case, my improvement comprehending means on the ring-like member for engaging and lifting the sealing-plate from its seat only after said member has been turned backwards and lifted a short distance, so that the sealing-plate remains in engagement with its seat during the initial movement of the ring-like member, and is then engaged and lifted by and with said member, and my improvement also comprehends means on the ring-like member for engaging the sealing-plate to move it into engagement with its seat.

Figure 1 shows in vertical section a portion of a fire extinguisher embodying this invention. Fig. 2 is an end side view of the sealing-plate. Fig. 3 is a plan view of the ringlike member and sealing-plate supported by it. Fig. 4 is a sectional detail of theringlike member and sealing-plate showing modi fied means on the ring-like member which extends beneath the edge of the sealingplate, whereby said plate is adapted to be lifted from its seat by the rotation of the ringlike member, but only after said member has been turned backwards and lifted a short distance. Fig. 5 is an edge view of the sealing-plate shown in Fig. 4, before the screwthread thereon has been crushed.

Referring to Figs. 1 to 3, the cylindrical or other shaped shell or case a is represented as having at its upper end an externally screwthreaded neck 0/ formed at its upper end to serve as a seatffl A ring-like member has a Specification of Letters Patent.

Application filed October 19, 1907.

Patented Jan. 5, 1909.

Serial No. 398,237.

portion 5, which extends inwardly over the top of the edge of a sealing-plate c, and a portion 6 which extends downwardly and is in ternally screw-threaded to engage the screwthreaded neck a, and a ring-like handle 6 which extends upwardly. in lieu of this means of securing the ring-like member to the neck any other suitable means may be employed. The sealing-plate c is loosely supported by said ring-like member. This plate is made circular and is provided on its under side, at its edge, with a recess in which a packing-ring c is placed, which latter is adapted to engage the seat which is formed at the upper end of the neck. The portion 1) of the ring-like member which overlies the edge of the sealing-plate preferably has formed on its under side an annular engaging portion or rib b which engages the top of the sealing-plate 0, directly over the seat, so that when the ring-like member is turned in a forward direction onto the neck the sealing plate will be moved toward the seat and will be held thereon with any desired degree of pressure. The rib 6 thus serves as an engaging-portion on the under side of the portion I) for engaging the sealing-plate. The portion 6 on the ring-like member is pro vided with means extending under the edge of the sealing-plate, which, when said ringlike member is turned backwards and lifted a short distance, will be brought into engagement with the edge of the sealing-plate, so that further upward movement of said me1nber will act to lift said plate away from its seat. As shown in Figs. 1 to 3, the sealingplate is formed at its edge with a pair of lugs 0 extending outwardly therefrom, and between the upper end of the screw-threaded part of the portion 6 and the overlying por tion Z) of the ring-like member an annular recess c is formed, which receives said lugs, so that the screw-threaded part extends beneath the edge of the sealing-plate. The width of the annular recess 0 is greater than the thickness of the lugs 0 To place the sealing-plate in position a vertical recess 0 is formed in the screw-threaded part of the portion 6, the threads at such point being cut away (see Fig. 3) wide enough for the passage of one of the lugs. To introduce the sealing-plate it will be tipped and one of the lugs will first be placed in the annular recess, at a point opposite said recess 0 then the plate will be thrust down against the portion 6, the lug passing along the recess c and then the plate will be turned in its own lane. p Referring to Figs. 4 and 5, a modified form of means for holding the sealinglate is shown, wherein it will be seen that t lie edge of the sealing-plate is formed with a single screw-thread c adapting it to be screwed into the portion 1), and at the top of the screw-threaded part of the portion 6 an annular recess 0 is formed, into which the screw-thread c on the plate enters. The plate is screwed into the portion 1) until its screw-thread enters the annular recess 0. Then one of the parts is struck a severe blow from above and the threads offset or crushed, so that the plate will be prevented from being removed from the ring-like member, yet it will be loosely supported thereby. It will be observed that the lugs c and the screwthread 0 each form an integral extension on the edge of the sealing-plate which enters the annular recess 0 and that the cut away portion 0 in Fig. 3, and the spiral groove formed by the screw-threads in Fig. 4, each serve as a passage leading to said annular recess 0, for the extension of the sealing-plate, whereby said extension may enter the annular recess. Furthermore, owing to the width of the annular recess being greater than the thickness of the lugs 0 or of the screwthread 0 the ring-like member may be turned backwards and lifted a short distance before said extensions are engaged by the ring-like member, and then as said member is turned backwards further, said extensions will be engaged and the sealing-plate lifted in a vertical direction away from its seat.

By means of the improvements herein described, it will be observed that the ring-like member which usually starts hard when removing it from the case, may be started independently of the sealing-plate, and that during such initial movement of said member said sealing-plate will remain in engagement with its seat, and after said member has been started and is free to be turned it will engage the sealing-plate and by such subsequent operation will lift the sealing-plate from its seat.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a fire-extinguisher, a case having a neck formed with a seat, a sealing-plate adapted to engage said seat having an extension at its edge, a ring-like member engaging said neck having a portion extended over the top of the edge of the sealing-plate and having an annular recess below said portion, of a width greater than the thickness of the extension on the edge of the sealing-plate, which receives said extension, whereby the ring-like member may be turned backwards and lifted a short distance independently of the sealing-plate but further backward and upward movement thereof will lift the sealing-plate bodily from its seat, substantially as described.

2. In a fire-extinguisher, a case having a neck formed with a seat, a sealing-plate adapted to engage said seat having an extension at its edge, a ring-like member engaging said neck having a portion extended over the top of the edge of the sealing-plate and having an annular recess below said portion, of a width greater than the thickness of the extension on the edge of the sealing-plate which receives said extension, whereby the ring-like member may be turned backwards and lifted a short distance independently of the sealing-plate but further backward and upward movement thereof will lift the sealing-plate bodily from its seat, said ring-like member also having a passage leading to said annular recess to provide for the entrance thereinto of said sealing-plate, substantially as described.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM H. BANFIL.

Witnesses B. J. Norms, H. B. DAVIS. 

